<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <div id="parent">
        <p>hello world</p>
        <p>hello world</p>
        <p>hello world</p>
        <p>hello world</p>
        <p>hello world</p>
    </div>
    <script>
    /* lastChild-->子节点
     lastElementChild-->元素子节点
     */
     var parent=document.getElementById("parent");
     var child=parent.lastElementChild;
    //  var child=parent.lastChild;
     console.log(child);
    </script>
</body>
</html>